virajjasani commented on code in PR #1736:
URL: https://github.com/apache/phoenix/pull/1736#discussion_r1450799726
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phoenix-core-client/src/main/java/org/apache/phoenix/iterate/OffsetResultIterator.java:
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@@ -32,32 +34,49 @@
*/
public class OffsetResultIterator extends DelegateResultIterator {
private int rowCount;
- private int offset;
+ private final int offset;
+ private Tuple lastScannedTuple;
private long pageSizeMs = Long.MAX_VALUE;
+ private boolean isIncompatibleClient = false;
public OffsetResultIterator(ResultIterator delegate, Integer offset) {
super(delegate);
this.offset = offset == null ? -1 : offset;
+ this.lastScannedTuple = null;
}
- public OffsetResultIterator(ResultIterator delegate, Integer offset, long
pageSizeMs) {
+ public OffsetResultIterator(ResultIterator delegate, Integer offset, long
pageSizeMs,
+ boolean isIncompatibleClient) {
this(delegate, offset);
this.pageSizeMs = pageSizeMs;
+ this.isIncompatibleClient = isIncompatibleClient;
}
+
@Override
public Tuple next() throws SQLException {
+ long startTime = EnvironmentEdgeManager.currentTimeMillis();
while (rowCount < offset) {
Tuple tuple = super.next();
- if (tuple == null) { return null; }
+ if (tuple == null) {
+ return null;
+ }
if (tuple.size() == 0 || isDummy(tuple)) {
// while rowCount < offset absorb the dummy and call next on
the underlying scanner
continue;
}
rowCount++;
- // no page timeout check at this level because we cannot correctly
resume
- // scans for OFFSET queries until the offset is reached
+ lastScannedTuple = tuple;
+ if (!isIncompatibleClient) {
Review Comment:
Incompatible client means that the client that does not understand new
format of cells returned by this particular change and hence we expect server
to return same old format of cells so that old (incompatible) client can
continue to work.
> in which cases will you have scenario where currentTime - startTime is
more than LONG_MAX?
LONG_MAX is only if paging size is not set. If it is set, then page timeout
value will be used.
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